Continue to Site

Eng-Tips is the largest engineering community on the Internet

Intelligent Work Forums for Engineering Professionals

  • Congratulations cowski on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

rechargeable alkalines charging alghorithm

Status
Not open for further replies.

wab6

Electrical
Nov 11, 2009
2
hi everyones
i am new to all this and i need your help.

I am making a AA battery charger and I was stuck on the battery charging algorithms of Li-Ion and the rechargeable alkaline batteries

I found the charging algorithm for the Li-ion as follows:

1) pre-charge if Vbat < 2.5 v at C/10
2) fast charge if 2.5 v < Vbat < 4.1 v at 1C
3) constant voltage charge at 4.2 V
4) and finally termination when charge drops below C/10

but however I cant not find anywhere the charging algorithm for the rechargeable Alkalines.

could any one please help me with this? thank you very much
 
Replies continue below

Recommended for you

IRStuff,

I don't think this is, or at least it isn't a homework problem. It looks like he has found and is trying to describe a charging algorithm for Lithium batteries. I think the C is the reference to the 1-hour capacity, so for example if the voltage is less than 2.5V then 'pre charge' it at a controlled current equal to 1/10 of 1-hour discharge rating.

I think what he is asking for is an algorithm to recharge the alkaline batteries, which I must admit I haven't seen.

What doesn't make sense is the idea of it being a AA charger, when AA batteries are 1.5V, unless it assumes that they will be connected in series.

 
Status
Not open for further replies.

Part and Inventory Search

Sponsor